Home / 209,693,505.76-289,312,901.72-121,569,913.02

Finding the Fourth Proportional to 209,693,505.76, 289,312,901.72 and 121,569,913.02

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Solution

The fourth proportional to 209,693,505.76, 289,312,901.72 and 121,569,913.02 is: 167,729,296.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,693,505.76 : 289,312,901.72 = 121,569,913.02 : x
  2. Step 2: Convert to fraction form
    209,693,505.76/289,312,901.72 = 121,569,913.02/x
  3. Step 3: Cross multiply
    209,693,505.76x = 289,312,901.72 × 121,569,913.02
  4. Step 4: Simplify right side
    209,693,505.76x = 35,171,744,298,597,172
  5. Step 5: Solve for x
    x = 35,171,744,298,597,172/209,693,505.76
  6. Step 6: Final answer
    x = 167,729,296.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.